Replacing oil seals, Breva 750

Hello,

I’m replacing the oil seals either side of the clutch, so where the drive shaft comes out of the engine, and where it goes into the gearbox. I want to get it right, I don’t fancy this level of dismantling a second time soon. In my enthusiasm I inserted the new oil seals as far as they would go (about 2-3mm below the surface), then remembered that the originals were flush with the surface. Is this going to be a problem? I’d rather replace them correctly now if they should be flush.
Thanks in advance,
Doug