Question: A problem with using "subs" command

While substituting expressions for θ(t),θ'(t),θ''(t) with some rather simple polynoms (see attached demonstration), the result icludes terms such as "·²" or "θ1·" (see terms multiplying ε⁸ and ε⁷in result for C1). It seems MAPLE treates the "·" sign as a variable/constant instead of as an operator. What am I doing wrong?

Screen capture:

Maple 1D Input:

thetaScaleDefinition := {diff(theta(t), `$`(t, 1)) = (`#msub(mi("D"),mn("0",fontstyle = "italic"))`+epsilon*`#msub(mi("D"),mn("1",fontstyle = "italic"))`)*(epsilon*theta1+epsilon^2*`#mo("⋅",fontstyle = "italic")`*theta2), diff(theta(t), `$`(t, 2)) = (`#msub(mi("D"),mn("0",fontstyle = "italic"))`^2+2*epsilon*`#msub(mi("D"),mn("0",fontstyle = "italic"))`*`#msub(mi("D"),mn("1",fontstyle = "italic"))`+epsilon^2*`#msub(mi("D"),mn("1",fontstyle = "italic"))`^2)*(epsilon*theta1+epsilon^2*theta2), theta(t) = epsilon*theta1+epsilon^2*theta2};

A1 := eta*mu*theta(t)*(diff(theta(t), t))^2/nu;

B1 := subs(thetaScaleDefinition, A1);

C1 := collect(B1, epsilon);