That's not surprising. Not sure about E-MU but Creative drivers have not supported anything below 48khz for over two decades. I remember this being the case as far as back as 2003 or 2004 when my gaming PC had a Soundblaster Audigy Pro or whatever their best soundcard was called at that time. Neither the WDM nor ASIO supported anything below 48khz. Since then I have had couple of other SoundBlasters and they had the same issue.
This issue about 44.1 kHz not being supported is not the case for me at all. I have no problem choosing 44.1 when using the E-mu ASIO drivers in my 64 bit standalone synths and DAW s/w such as Cubase. In fact, my 1820m comes up default in 44.1.
I literally just now tested this to double check the settings and played some notes in Serum running in IL Minihost Modular (64 bit) which comes up much quicker than Cubase 10 for testing.
Now if I could just get the E-mu ASIO driver to show up in the audio driver list in my 32 bit synths. I am reduced to running the 32 bit version of VEP (Vienna Ensemble Pro) Server to host my 32 bit "legacy" synths where I do not have a 64 bit version VST of a given synth available. I then insert the 64 bit VEP VST into 64 bit Cubase and it slaves the 32 bit VEP Server. It can do this internally or via 1 GB network connection on both ends.
VEP in server mode does not require nor use ASIO audio channels but rather each "instance" of VEP Server provides up to 32 virtual audio channels which send the audio from each VST hosted in the VEP Server back to the VEP VST hosted in my 64 bit Cubase DAW which does have access to the Thirty-two 64 bit E-mu ASIO audio channels.
This may sound convoluted but it works and I have found VEP to be essential to running lots of MIDI Instrument tracks in Cubase such as for orchestral arrangements. I actually have 3 licenses of VEP v7 which allows me to use three VST "slaves" all receiving MIDI from and returning audio to a master machine running my Cubase DAW.
This approach may seem confusing and/or convoluted to some but it is a workable workaround for my 32 bit VST's. And it works for 64 bit VST's as well but those must of course must be hosted in a 64 bit VEP Server host of course.