hey no probs smile
it's really hard to figure the calcium mag and zinc ratio for high-dosing d3. there's a good embry set of instructions out there which says take 1200mg of calcium per day and 600 - 1200mg of magnesium. i don't think a regular multivitamin will be that high. you should be able to find cal-mag pills that already have the zinc included in the right ratio.
try to get as much minerals as possible from dietary sources though. and d3 from fish. i've found i can eat an entire bunch of dark leafy greens at one meal, once they're steamed. my one doc told me to eat fish three times a week, i'm still not up that high but i should get my act together.
when you take your calcium/magnesium/zinc pill at the same time as d3, the d3 pill will monopolize those minerals, yes. d3 and those minerals all work together. but you have to get some intake where d3 is not hogging it all. your body needs to get those minerals for other purposes too. for example it's good to get some magnesium and potassium intake at the same time, away from the d3. i have started eating a lot more dark leafy greens for the mag, and much more fruit like cherries and raisins for the potassium. it helps.
you could probably find a good pharmacist to talk to about timing of all this stuff. try out a few compounding pharmacies until you get a nutrient biochemistry guru. if you get a good one, he or she will know all the details and can tell you the right foods, all that kind of thing.
do i think it's strange? no. do i think it's bad? YES. docs are so not interested in that kind of thing. people need to realize that it's their own job to stay well, doctors are only there to manage sick people, not make you better.