Thanks. That makes sense, in line with the real Memory Man's limitations.
What I'm experiencing is a little more strange, and is happening on short delay times. I may not understand how it works. Most recently I experienced the same delay time when selecting 1/8, dotted 1/8, and triplet 1/8. Then another time at 1/4, dotted 1/4, and triplet 1/4. I couldn't discern any connection between those times and the flashing of the tempo light. At other times it doesn't work that way, though.
Sometimes I could set it where I wanted it, switch to milliseconds, then switch back to tempo, and it would work properly. Something about the switching got the message across.