at different conferences vs at different conferences at different

Some examples from the web:

• My lower half is appearing at a different conference in a different country.
• Sometimes, it seems as if our Commissioners are looking at a different Conference from the one Mr Bolkestein is talking about, when he states that such a conference promotes a sense of victimisation in people who already have the feeling of being victims.
• We should be the first to present different initiatives at conferences or whatever, to exchange good practice, and so on.
• Only the totality of these different conferences give a meaningful response to the challenges of sustainable development and it is this totality that defines what we like to call the global deal.
• We should thus also avoid holding 25 different press conferences in which everyone is a hero.
• We have seen this in the aborted Seattle Conference and we are now seeing it in the bilateral conferences with different regions or countries of the world.
• Two additional conferences addressed different aspects of the workings of the money markets and the retail payment markets.
• The Commission will of course participate, to the extent possible, in the different events, conferences and meetings arranged by, and in cooperation with, the FAO and other international organisations.
• having regard to the Charter of the United Nations and to the development targets and principles agreed in the different United Nations conferences,
• The Commission is involved at different levels in the events that are organised in the context of the Transatlantic Business Dialogue, including an annual conference between the CEOs of the various companies, which could be said to form the annual highpoint of this dialogue.
• Couples have survived working at different firms before.
• Collective agreements are concluded at different levels in each country.
• Countries' trade potential will develop at different speeds.
• Repeat tests must be carried out at different sessions.
• It is in the interests of all those concerned that employee representatives at different levels should not receive information on the same issue at different points in time.
• So some of them stayed at different hotels and ate at different restaurants.
• Women leave the workforce at different times.
• So it shows up at different times each week.
• The two Directives are at different stages of transposition into national law.
• Member States are at different stages in the waste management decision-making process.

Some examples from the web:

• My lower half is appearing at a different conference in a different country.
• Couples have survived working at different firms before.
• Collective agreements are concluded at different levels in each country.
• Countries' trade potential will develop at different speeds.
• Repeat tests must be carried out at different sessions.
• It is in the interests of all those concerned that employee representatives at different levels should not receive information on the same issue at different points in time.
• So some of them stayed at different hotels and ate at different restaurants.
• Women leave the workforce at different times.
• So it shows up at different times each week.
• The two Directives are at different stages of transposition into national law.
• Member States are at different stages in the waste management decision-making process.
• We spent the day shooting at different diners in D.C.
• Unless these guys went home and changed shoes in between crimes, we're looking at different gangs.
• In other cases both classes of expenditure are relieved, but at different rates.
• All European Parliament elections were very important because they were held at different historical moments.
• All attacked at different times of the day.
• People can metabolize toxins at different rates.
• I'm just saying the foundation is looking at different priorities.
• But cells of different organs reproduce at different rates.
• And that's because these animals moved at different speeds.