I am afraid, *haamster58, that the problem, may be you!
As we get older our sense of change does fade a bit, that is why older people were once notrious for pouring salt and pepper on all their food. The medications you take, if any can also distort your sense of taste.
Also our memory of how things tasted can, like everything else in life, fade with time. So that the memory we think we have isn't quite what it ought to be.
Think of things you remember from some time ago, a house you lived in 40 years ago, or something like that. When you go back often what you remember isn't quite what was actually there. The bathroom isn't where you remember it, or the bend of the stairs is different.