Gantt Chart issue

Hi ya

Hoping someone can help me out. I have found a flaw in my gantt chart, as soon as i have multiple jobs starting on the same day the first client name comes up and not all the other client names.

the chart is generated by a table which has been created by a small formula to get the dates in the correct order. the column name is start date

the table layout is

customer id, customer name, start date, finish date.

the rest of the information is entered in via a vlookup formula based on the start date, and this is where i am having the issue of only getting one name even though there can be multiple names with the same start date.

can anyone help me out with what formula i need to add, NO VBA PLEASE

Ta much