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If you have a lot of condensation on the inside of the flysheet and the inner touches it, the inner will wick the water through into a puddle. This doesn't mean the flysheet is leaking though. Condensation will also spray from the roof if the rain is pelting hard enough on the outside to make the flysheet bounce. It's only in cotton canvas that when the inner touches the outer it causes the rain to seep through the flysheet. This just doesn't happen in synthetic tents unless the outer fabric is very old and started to degrade. The vast majority of leaks in synthetic tents are via the seams.

So, consider if it was condensation. Classic weather conditions for bad condensation are continuous rain and very cold outside. Was there any extra source of water vapour in the tent, such as wet coats/towels/dogs, or you cooking/boiling a kettle? Finally, were the vents all opened fully?

I've just replied to your note in the other thread...

Helen